Publication Date:
2021-11-03
Description:
Abstract
Description:
This dataset provides friction data from ring-shear tests (RST) for mixtures of quartz sand and sili-cate cenospheres, which are used for analog experiments in the laboratory of the Institute of Geo-physics of the Czech Academy of Science (IG CAS) (Warsitzka et al., 2021). The mixtures have been characterized by means of internal friction coefficients µ and cohesion C as a remote service by the Helmholtz Laboratory for Tectonic Modelling (HelTec) at the GFZ German Research Centre for Geosciences in Potsdam.
According to our analysis the materials show a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak friction coefficients µP of the tested materials range between 0.55 and 0.75, dynamic friction coefficients µD between 0.47 and 0.60 and reactivation friction coefficients µR be-tween 0.52 and 0.65. Cohesions of the materials vary between 20 and 120 Pa. The materials show a minor rate-weakening of 〈1.2% per ten-fold change in shear velocity v.
Keywords:
EPOS
;
multi-scale laboratories
;
analogue models of geologic processes
;
property data of analogue modelling materials
;
Cohesion
;
deformation 〉 fracturing
;
earth interior setting 〉 crust setting 〉 continental-crustal setting 〉 upper continental crustal setting
;
EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS
;
EARTH SCIENCE SERVICES 〉 DATA ANALYSIS AND VISUALIZATION 〉 CALIBRATION/VALIDATION
;
fault
;
Force sensor
;
Friction coefficient
;
Iron Powder
;
Ring-shear tester
;
Sand 〉 Quartz Sand
;
tectonic and structural features
Type:
Dataset
,
Dataset
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